This drill chuck arbor is heavy duty, and made to do the job right every time you use it. You can attach a buffing pad or a circular cutter to the arbor, and insert into any drill with confidence, knowing you are using a quality product that will not let you down. There are 5 pieces put together to comprise this unit: 1/2" screw with 1/4" shank and top cap, two nuts and two washers.* Head is one inch across and unit is 4 inches long approximately * 1/2 inch screw and 1/4 inch shank to fit many standard applications * Comes with 2 nuts and 2 washers for a stay-tight fit that will not disappoint * Al l metal construction for a durable product * Fully adjustable nuts and bolts to get the right fit every time